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Finding the Fourth Proportional to 193,638.74, 290,571.75 and 81,310.28

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Solution

The fourth proportional to 193,638.74, 290,571.75 and 81,310.28 is: 122,013.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,638.74 : 290,571.75 = 81,310.28 : x
  2. Step 2: Convert to fraction form
    193,638.74/290,571.75 = 81,310.28/x
  3. Step 3: Cross multiply
    193,638.74x = 290,571.75 × 81,310.28
  4. Step 4: Simplify right side
    193,638.74x = 23,626,470,352.59
  5. Step 5: Solve for x
    x = 23,626,470,352.59/193,638.74
  6. Step 6: Final answer
    x = 122,013.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.